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Irregular Shape Greenhouses

Fully Custom Greenhouse Designs for Unique Sites & Architecture

Not every greenhouse fits neatly into a rectangle. Some of our most successful and inspiring greenhouse projects are the ones that break the mold entirely! Over our 75-year history, these are the projects that stand out in our minds.

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Over the years, our customers have requested Irregular shaped greenhouses that are fully custom to respond to challenging sites, architectural constraints, or bold design ideas like the 20-foot pyramid greenhouse in Texas.

At BC Greenhouse Builders, custom greenhouses in unique or irregular shapes are one of our specialties and a point of pride. Very few manufacturers have the design expertise, engineering coordination, and fabrication capabilities needed to bring these projects to life successfully.

What Is an Irregular Shaped Greenhouse?

An irregular shaped greenhouse is any greenhouse that moves beyond a standard rectangular footprint.

These projects are intentionally custom and may include:

  • Jogged or stepped foundations
  • Non-parallel walls
  • Angled or triangular layouts
  • Split elevations or tiered designs
  • Inverted or unconventional rooflines
  • Greenhouses that wrap around buildings or landscape features

When an Irregular Shaped Greenhouse Makes Sense

Irregular designs are often the best solution when working with complex or constrained properties, including:

  • Sloped, Terraced, or Uneven Yards
  • Greenhouses can be stepped into hillsides or aligned with existing grade changes using jogged foundations.
  • Retaining Walls, Rocky Ledges, and Bedrock

Custom footprints allow the greenhouse to work around immovable site conditions while maintaining structural integrity:

  • Existing Structures like chimneys, exterior staircases, mechanical rooms or an existing jut out in a foundation.
  • U-Shaped or Courtyard Designs to create sheltered climates

Jogged Foundations: A Key Tool in Irregular Design

Jogged foundations are one of the most common techniques used in irregular shaped greenhouse projects.

A jogged foundation intentionally changes direction, elevation, or footprint to adapt to site constraints. This allows the greenhouse structure to:

  • Step with grade changes
  • Align with retaining walls
  • Offset around obstacles
  • Match irregular lot lines or architectural forms

Not all irregular shaped greenhouses require jogged foundations, but many rely on them as part of the overall solution.

How These Projects Are Designed

Irregular shaped greenhouses are never modified after installation. They are designed to work within an existing footprint.

Our process includes:

  • Detailed site review using photos, measurements, surveys, or drawings
  • Concept layouts that explore footprint and roof geometry options
  • Structural coordination to ensure loads transfer correctly
  • Foundation drawings and build guidance for contractors
  • Custom fabrication to match the approved design exactly

Because each project is custom, precision is needed at every stage.

Are Irregular-Shaped Greenhouses More Expensive?

Costs vary depending on complexity, but irregular designs often save time and money overall by:

  • Avoiding excessive excavation or demolition
  • Preserving existing structures and landscape features
  • Reducing risk during construction
  • Ensuring long-term structural performance

Most clients choose an irregular shaped greenhouse because it makes the project possible, not because it is the simplest option.

Frequently Asked Questions About Irregular Shaped Greenhouses

Within practical engineering and site constraints, yes. If the site can be accurately measured and the design properly coordinated, highly customized shapes are achievable.

Yes. Snow, wind, and environmental loads are addressed during the design phase based on site-specific conditions.

BC Greenhouse Builders provides the greenhouse design and foundation specifications. Foundations are typically built by a local contractor familiar with permitting and site conditions.

Absolutely. Irregular shaped greenhouses are commonly used for private residences, schools, gardens, and architect-led projects.

Why Choose BC Greenhouse Builders for Irregular Shaped Greenhouses?

Irregular shaped greenhouses are where experience matters most.

Let’s Talk About What’s Possible on Your Site

If your property or design vision does not fit a standard greenhouse footprint, an irregular shaped greenhouse may be the right solution.

Our team is happy to review your site and explore options with you.

Start the design conversation today.

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Kind Words from happy customers

Potential customers may be interested in the following: I am retired with a very bad back and a twice broken collarbone that restricts the height I can reach with my right arm. I put the greenhouse up by myself with the help of three ladders and a bunch of bungee cords. It took six days including the time to re-do the base but a day and half of that was waiting for you to open to get information. So four and a half days for one person. We are very happy with the greenhouse.

Options & Additions  to make it your own

Frequently Asked Questions

When selecting a site for your foundation, choose a flat, level surface where your greenhouse can be easily installed, stable and secure. Locate your greenhouse close to power and water, while also considering water drainage and easy access. Try to locate the greenhouse so that 6 hours of sunlight is available during winter months. For more information, please visit https://blog.bcgreenhouses.com/tips-for-placing-your-greenhouse

The rules for the permit process depends on your municipality but generally speaking, a structure less than 120 square feet that is not considered permanent does not require a permit. We are able to provide engineered shop drawings to secure the required permits, if necessary. For more information, please visit https://info.bcgreenhouses.com/en-ca/greenhousepermit

Yes. BC Greenhouse Builders ships curbside across the U.S. and Canada, with clear delivery instructions and support to make receiving and installation straightforward. Read more about shipping and delivery.

Standard frames are engineered for 85 mph wind and 32 psf snow, with optional upgrades to ~140 mph wind and 110 psf+ snow for heavy-weather sites. Learn more about our exceptional greenhouse strength.

Primarily the roof slope (Cape Cod 45°, Cottage 35°, Traditional 23°, Pacific 23° curved). Everything else, size, glazing, doors, vents, is customized to your site and goals.

Most standard greenhouses are ready in 4-8 weeks depending on season and volume; your Greenhouse Expert will confirm your timeline.

Choose based on climate, seasons, and what you’ll grow: polycarbonate boosts insulation and diffuses light; glass maximizes clarity and a classic look. We’ll size heating/cooling to match. See glazing options.

Yes, Meridian Estate Greenhouses deliver thermally improved frames, project management, and full climate-control integration for year-round living and growing. Explore Meridian Estate.

About 75% of customers install themselves or with a local contractor using our step-by-step instructions and videos; we’ll advise on foundations and anchoring. View install guides.

Explore the New 2026 Greenhouse Catalog!

Let us guide you through your new greenhouse gardening adventure, every step of the way.

Over 75 Years of Manufacturing the Strongest Greenhouses
Our Online Store Has moved!

We’re proud to share that BC Greenhouse Builders — a long-standing Canadian company — has acquired Charley’s Greenhouse & Garden in Washington State. It’s a feel-good story of Canadian growth!

You’ll now find all your favorite greenhouse supplies and gardening tools in one convenient shop — with simple home delivery across Canada or pickup available from our Surrey, BC facility.

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